Scientists need a super-sad movie to use in various studies...

... and they've been using "The Champ" too long. What are the alternatives?

Uncle Ira, in the comments there, names the movie I would name.

IN THE COMMENTS: Coldstream said:

Curious Professor, if you meant the film "Grave of the Fireflies" which was first mentioned by commenter Zardoz which Uncle Ira appears to be commenting on, or if you actually mean the movie "Zardoz"...the saddest part of that movie is Connery's outfit.

LOL. I meant "Grave of the Fireflies" (which has been listed in my Blogger profile as one of my small collection of favorite movies for many years).